public class Test024{
    public static void main(String[] args) {
        int[] array = {1,2,3,4,5} ;
        System.out.println(avg(array));
    }

    public static double avg(int[] array) {
        int sum = 0;
        for(int i=0;i<array.length;i++){
            sum += array[i];
        }
        return sum*1.0/ array.length;
    }
}